Decoherence in a Cooper pair shuttle
Alessandro Romito, Francesco Plastina, Rosario Fazio
DOI 10.1103/PhysRevB.68.140502 · Physical Review B
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Abstract
We examine decoherence effects in the Josephson current of a Cooper pair shuttle. Dephasing due to gate voltage fluctuations can either suppress or enhance the critical current and also change its sign. The current noise spectrum displays a peak at the Josephson coupling energy and shows a phase dependence.
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